High pressure aloft will strengthen to the west of Utah Friday,
then shift east into the northern Great Basin for the weekend. This will result
in a prolonged period of inversion conditions through at least Monday in
the valleys of northern Utah.
Pollution levels are currently ~30 mg/m3. Expect particulate pollution
to increase ~5 mg/m3 per day on average in the Salt Lake Valley through Monday.
This means several days exceeding the National Ambient Air Quality Standard
are likely Friday - Monday.
Fog and clouds within the cold-air pool will become increasingly likely
as the inversion strengthens this weekend.
More detailed 7-day forecasts will start on 15 January.
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